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Quantum Cryptography Security

Refrence-Frame-Independent Quantum Key Distribution over 250 km of Optical Fiber

arXiv
Authors: Xin Liu, Di Luo, Zhicheng Luo, Shizhuo Li, Zhenrong Zhang, Kejin Wei

Year

2024

Paper ID

67266

Status

Preprint

Abstract Read

~2 min

Abstract Words

108

Citations

N/A

Abstract

The reference-frame-independent quantum key distribution (RFI QKD) protocol enables QKD systems to function effectively despite slowly varying reference frames, offering a distinct advantage in practical scenarios, particularly in mobile platforms. In this study, we successfully distribute secure key bits over a 250-km optical fiber distance by developing an RFI QKD system with a repetition rate of 150 MHz. Benefiting from high repetition rate, we achieve a finite-key secret key rate of 49.65 bit/s at a distance of 200 km, which is more than three times higher than state-of-the-art systems. Our work dramatically extends the transmission distance and enhances the secret key rate of RFI QKD, significantly promoting its practical application.

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  • The reference-frame-independent quantum key distribution (RFI QKD) protocol enables QKD systems to function effectively despite slowly varying reference frames, offering a...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2405.16558 [2] arXiv https://arxiv.org/abs/2405.16558 [3] Publisher https://arxiv.org/abs/2405.16558

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